US3292092A - Device for the triggerng of cathoderay oscillographs for indexing internal combustion engines - Google Patents

Device for the triggerng of cathoderay oscillographs for indexing internal combustion engines Download PDF

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Publication number
US3292092A
US3292092A US384166A US38416664A US3292092A US 3292092 A US3292092 A US 3292092A US 384166 A US384166 A US 384166A US 38416664 A US38416664 A US 38416664A US 3292092 A US3292092 A US 3292092A
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United States
Prior art keywords
pulse
oscillograph
triggering
rotary member
produce
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US384166A
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English (en)
Inventor
Germann Reimar
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Individual
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/20—Cathode-ray oscilloscopes
    • G01R13/208—Arrangements for measuring with C.R. oscilloscopes, e.g. vectorscope
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
    • F02P17/02—Checking or adjusting ignition timing
    • F02P17/04—Checking or adjusting ignition timing dynamically
    • F02P17/08—Checking or adjusting ignition timing dynamically using a cathode-ray oscilloscope
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • G01M15/06—Testing internal-combustion engines by monitoring positions of pistons or cranks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/20—Cathode-ray oscilloscopes
    • G01R13/22—Circuits therefor
    • G01R13/32—Circuits for displaying non-recurrent functions such as transients; Circuits for triggering; Circuits for synchronisation; Circuits for time-base expansion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks

Definitions

  • the invention relates to a device for the triggering of cathode-ray oscillographs in connections with the index ing of internal combustion engines of the two or fourstroke type.
  • the cathode-ray oscillograph For indexing internal combustion engines and compressors it is necessary to release the cathode-ray oscillograph at a predetermined moment. This moment should, therefore be capable of being preset and distinctly associated with the crank angle position. This association presents certain difficulties with four-stroke engines insofar as the periodic release occurs only after each 720, that is upon completion of the second revolution.
  • active pulse pick-ups have proved to be particularly useful, as mechanical contact-making has been found to be impractical for most applications, particularly within the high-speed range.
  • Eflicient pulse pick-ups are either photoelectric or electromagnetic, the latter type being preferred on account of its rugged construction which ensures dependable operation even under highly vibratory operating conditions and moreover, does not require any light and consequently, voltage source.
  • Four-stroke operation also involves the need for easy adjustability of the triggering moment within the entire range of the cycle of operations. This is also a must for the isolated deflection of the cathode-ray oscillograph, as this operation of the oscillograph alone provides faultless oscillograms. Another advantage is the speed of switching operations for the recording of the compression process or of changing charges.
  • the device according to the invention eliminates these difficulties and meets the requirements hereabove described by providing for the induction of a pulse voltage by means of an indicator element displaceably located on a disk positively connected with the crankshaft or driving shaft of the engine to be indexed in an active, preferably electromagnetic pulse pick-up, said voltage being delivered to a limiter and a pulse pick-up stage, and subsequently to a bistable stage of a binary reducer comprising a direct and an inverted output controlling the subsequent monostable stage after every second input pulse, the said monostable stage in turn releasing the rectangular pulse required for triggering and independent of the type of input voltage available.
  • a. pulse is made available at the cathode-ray oscillograph WhiCh'is distinctly associated both with regard to its timing and location, with the position of the indicator element in relation to the pulse pick-up, the triggering moment being chosen as required.
  • the direct or the inverted output of the binary reducer can be connected as required to the monostable stage by means of a switch following the said binary reducer.
  • this provides a means of preselecting the triggering range either for recording the pressure or charge change diagram, the switchover being conveniently effected without interrupting the operation.
  • the binary reducer is switched off via a third switch position, a pulse for triggering, controlling or measuring being generated during each revolution of the crankshaft or driving shaft.
  • a device featuring a similar switching arrangement can therefore, be used indiscriminately both for two-stroke and four-stroke operation, the switchover from one type of operation to the other being effected merely by actuating the switch without exchanging or replacing any switch elements.
  • two indicator elements may be arranged on the disk. This provides the possibility of preselecting the triggering range of two-stroke engines in the same manner as with four-stroke engines.
  • An indicator element 1 made from some ferromagnetic material, is arranged on an antimagnetic disk 3 positively connected with the crankshaft or driving shaft 2 of the engine to be indexed.
  • the indicator element 1 is displaceable in the peripheral direction of the disk 3 and can be secured in any position.
  • a stationary pulse pick-up 4 located outside the disk 3 and consisting for example, of a permanent magnet and a pickup coil surrounded by a stationary magnetic field, induces a pulse voltage in the pick-up coil when passing by the pulse pick-up 4.
  • the pulse pick-up 4 is followed by a pulse generator 5 comprising a limiter stage for the occasionally necessary limitation of the amplitude of the pulse voltage supplied by the pulse pick-up 4.
  • the pulse generator 5 the input voltage is converted into rectangular pulses.
  • the rectangular pulses control a bistable stage 6 of the binary reducer type presenting a direct output 7 and an inverted output 8. After two input pulses a positive voltage leap occurs at the output 7 of the bistable stage 6 which in turn controls the following monostable stage 10 via a selector switch 9. Consequently, a pulse of a certain predetermined duration for the triggering of the cathode-ray oscillograph is available after every second revolution of the crankshaft 2 at the output 11 of the monostable stage 10.
  • the monostable stage 10 can, however, also be connected to the inverted output 8 of the binary reducer 6, so as to produce pulses which are offset by a crank angle of
  • the selector switch 9 permits the preselection of the triggering range from crank angles of 0 to 360 or of 360 to 720 and con sequently, the recording, either of the compression or of the charge-change diagram as required.
  • the selector switch 9 comprises a third switch position wherein the monostable stage 10 is directly connected with the output of the pulse generator 5, by-passing the bistable stage 6. This switch position is destined for the recording of diagrams of two-stroke engines, as it produces a triggering pulse at each revolution.
  • an additional indicator element 1 is provided on the disk 3, said additional indicator element 1' being offset by 180 in relation to the indicator element 1.
  • the triggering ranges extend over crank angles of 0 to 180 and of 180 to 360.
  • the switching arrangement according to the invention can also be used for the indexing of rotary piston-type machines.
  • the oscillograph being adapted to view operational characteristics of internal combustion engines of both the two-stroke and four-stroke type having a rotary member coupled thereto and driven thereby, with an indicator element displaceably arranged for securing at a variable position on said rotary member of the engine to be indexed, a corresponding pick-up device arranged adjacent the path of said indicator element to produce a pulse voltage therefrom as the rotary member rotates,
  • the improved system for deriving an indexing waveform from said pulse voltage for synchronizing said oscillograph to view various operational modes in said engines comprising a processing channel for converting the form of said pulse voltage into an index waveform by means of a pulse shaping circuit processing said pulse voltage to produce a pulse of standardized shape and amplitude, a bistable state circuit connected for operation from said pulse of standardized shape and amplitude to produce alternating output signals at both a direct and an inverted output

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
US384166A 1963-07-22 1964-07-21 Device for the triggerng of cathoderay oscillographs for indexing internal combustion engines Expired - Lifetime US3292092A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT586863A AT243536B (de) 1963-07-22 1963-07-22 Einrichtung zur Triggerung von Kathodenstrahloszillographen bei der Indizierung von Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
US3292092A true US3292092A (en) 1966-12-13

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ID=3580421

Family Applications (1)

Application Number Title Priority Date Filing Date
US384166A Expired - Lifetime US3292092A (en) 1963-07-22 1964-07-21 Device for the triggerng of cathoderay oscillographs for indexing internal combustion engines

Country Status (4)

Country Link
US (1) US3292092A (enrdf_load_stackoverflow)
AT (1) AT243536B (enrdf_load_stackoverflow)
CH (1) CH419654A (enrdf_load_stackoverflow)
DE (1) DE1250158B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4039931A (en) * 1975-07-15 1977-08-02 Robert Bosch G.M.B.H. System to sense a marker on a rotating body
FR2342591A1 (fr) * 1976-02-24 1977-09-23 Bosch Gmbh Robert Installation pour l'exploitation des signaux d'indicateurs electromecaniques de reperes angulaires
US4641977A (en) * 1983-04-11 1987-02-10 Woollenweber William E Bearing system
US5025629A (en) * 1989-03-20 1991-06-25 Woollenweber William E High pressure ratio turbocharger
US5094587A (en) * 1990-07-25 1992-03-10 Woollenweber William E Turbine for internal combustion engine turbochargers

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863114A (en) * 1956-05-07 1958-12-02 Allen Elect Equip Method and apparatus for monitoring the ignition timing of an internal combustion engine
US2928040A (en) * 1956-11-23 1960-03-08 Land Air Inc Sweep generating circuits for cathode ray oscillographs
US2941396A (en) * 1953-07-02 1960-06-21 Phillips Petroleum Co Electronic engine analyzer
US2948857A (en) * 1956-11-23 1960-08-09 Land Air Inc Sweep generators for cathode ray oscillographs
US3002153A (en) * 1958-07-08 1961-09-26 Itt Horizontal sweep generator
SU144625A1 (ru) * 1960-02-29 1961-11-30 Ю.М. Горский Устройство дл измерени и регистрации угла опережени зажигани в двигател х внутреннего сгорани

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941396A (en) * 1953-07-02 1960-06-21 Phillips Petroleum Co Electronic engine analyzer
US2863114A (en) * 1956-05-07 1958-12-02 Allen Elect Equip Method and apparatus for monitoring the ignition timing of an internal combustion engine
US2928040A (en) * 1956-11-23 1960-03-08 Land Air Inc Sweep generating circuits for cathode ray oscillographs
US2948857A (en) * 1956-11-23 1960-08-09 Land Air Inc Sweep generators for cathode ray oscillographs
US3002153A (en) * 1958-07-08 1961-09-26 Itt Horizontal sweep generator
SU144625A1 (ru) * 1960-02-29 1961-11-30 Ю.М. Горский Устройство дл измерени и регистрации угла опережени зажигани в двигател х внутреннего сгорани

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4039931A (en) * 1975-07-15 1977-08-02 Robert Bosch G.M.B.H. System to sense a marker on a rotating body
FR2342591A1 (fr) * 1976-02-24 1977-09-23 Bosch Gmbh Robert Installation pour l'exploitation des signaux d'indicateurs electromecaniques de reperes angulaires
US4641977A (en) * 1983-04-11 1987-02-10 Woollenweber William E Bearing system
US5025629A (en) * 1989-03-20 1991-06-25 Woollenweber William E High pressure ratio turbocharger
US5094587A (en) * 1990-07-25 1992-03-10 Woollenweber William E Turbine for internal combustion engine turbochargers

Also Published As

Publication number Publication date
DE1250158B (enrdf_load_stackoverflow) 1967-09-14
CH419654A (de) 1966-08-31
AT243536B (de) 1965-11-10

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